Anybody else have some suggestions for road routes in Duluth or the northeastern section of MN? I'm looking for something in the 100-150 mile range. I was messing around on Google maps and I came up with a few routes, but I have no idea what the roads are like. Any advice or alternate routes would be appreciated.

http://goo.gl/maps/Ztj9
http://goo.gl/maps/5o65
http://goo.gl/maps/Z0BZ

(If you know of any can't-miss routes near MSP, feel free to throw those in, as well.)